Fails with misleading error on Windows

[fegu]

Running on windows with code copied directly from example and docs one gets the potentially confusing error "getAddrInfo: does not exist (error 10093)".

This is a common (and misleading) error for all Haskell networking code on Windows (see http://hackage.haskell.org/trac/ghc/ticket/4454)

The solution is to wrap the forkServer with:
withSocketsDo $ forkServer (BS8.pack "localhost") 8000

and also adding:
import Network.Socket (withSocketsDo)

This is best practice on all code, not only for Windows, since this adds Windows support without breaking anything on other platforms.

Proposed solution: adding withSocketsDo inside forkServer.
Change Line 224 in monitoring.hs to:
tid <- withSocketsDo $ forkIO $ startServer counters gauges labels host port